منتدى استراحات زايد - CMS mysql database error on CMS page

Our forums and CMS have been working fine until this morning when now the CMS gives a database error on CMS home page only, forums etc working fine, error is only in Firefox and Chrome and the CMS works fine in IE8

It seems related to the recent forum posts widget as I removed them and added one by one until it broke again....this is the error, I had to cut most of it as the error was massive and crashes firefox.

Quote:
Database error in vBulletin 4.0.1:

Invalid SQL:

REPLACE INTO cache
SET cacheid = 'widget.18c8bc26068aa08f99e65680f21a675e',
expires = 1264842134,
created = 1264841834,
locktime = 0,
data = "O:17:\"vB_Search_Results\":10:{s:23:\"\0vB_Se arch _Results\0user\";O:21:\"vB_Legacy_CurrentUser\":5: {s:14:\"\0*\0attachments\";N;s:16:\"\0*\0hidden_fo rums\";N;s:22:\"\0*\0unsearchable_forums\";N;s:11: \"\0*\0registry\";O:11:\"vB_Registry\":96:{s:9: \"d atastore\";O:12:\"vB_Datastore\":5:{s:12:\"default items\";a:13:{i:0;s:7:\"options\";i:1;s:9:\"bitfie lds\";i:2;s:15:\"attachmentcache\";i:3;s:10:\"foru mcache\";i:4;s:14:\"usergroupcache\";i:5;s:10:\"st ylecache\";i:6;s:13:\"languagecache\";i:7;s:8:\"pr oducts\";i:8;s:10:\"pluginlist\";i:9;s:4:\"cron\"; i:10;s:12:\"profilefield\";i:11;s:9:\"loadcache\"; i:12;s:11:\"noticecache\";}s:8:\"registry\";R:6;s: 8:\"dbobject\";O:11:\"vB_Database\":18:{s:9:\"fun c tions\";a:21:{s:7:\"connect\";s:13:\"mysql_connect \";s:8:\"pconnect\";s:14:\"mysql_pconnect\";s:9 :\" select_db\";s:15:\"mysql_select_db\";s:5:\"query\" ;s:11:\"mysql_query\";s:16:\"query_unbuffered\";s: 22:\"mysql_unbuffered_query\";s:9:\"fetch_row\";s: 15:\"mysql_fetch_row\";s:11:\"fetch_array\";s:17:\ "mysql_fetch_array\";s:11:\"fetch_field\";s:17 :\"m ysql_fetch_field\";s:11:\"free_result\";s:17:\"mys ql_free_result\";s:9:\"data_seek\";s:15:\"mysql_da ta_seek\";s:5:\"error\";s:11:\"mysql_error\";s:5:\ "errno\";s:11:\"mysql_errno\";s:13:\"affected_ rows \";s:19:\"mysql_affected_rows\";s:8:\"num_rows\ ";s :14:\"mysql_num_rows\";s:10:\"num_fields\";s:16:\" mysql_num_fields\";s:10:\"field_name\";s:16:\"mysq l_field_name\";s:9:\"insert_id\";s:15:\"mysql_inse rt_id\";s:13:\"escape_string\";s:19:\"mysql_escape _string\";s:18:\"real_escape_string\";s:24:\"mysql _real_escape_string\";s:5:\"close\";s:11:\"mysql_c lose\";s:15:\"client_encoding\";s:21:\"mysql_clien t_encoding\";}s:8:\"registry\";R:6;s:10:\"fetchtyp es\";a:3:{i:2;i:2;i:1;i:1;i:0;i:3;}s:7:\"appname\ " ;s:9:\"vBulletin\";s:12:\"appshortname\";s:9:\"vBu lletin\";s:8:\"database\";s:11:\"thescuderi1\";s:1 7:\"connection_master\";i:0;s:16:\"connection_sla v e\";R:52;s:17:\"connection_recent\";R:52;s:11:\" mu ltiserver\";b:0;s:15:\"shutdownqueries\";a:1:{s:9: \"lastvisit\";s:83:\"\nFROM \

serialized = '1';

MySQL Error : Got a packet bigger than 'max_allowed_packet' bytes
Error Number : 1153
Request Date : Saturday, January 30th 2010 @ 08:57:14 AM
Error Date : Saturday, January 30th 2010 @ 08:57:15 AM
Script : http://www.thescuderia.net/forums/content.php
Referrer : http://www.thescuderia.net/forums/forum.php
Classname : vB_Database
MySQL Version : 5.0.77

Any ideas why this has suddenly happened?